Scan your resume against ATS criteria for this Front End Developer (React.js) role at CustomerLabs.
CustomerLabs is a fast-growing B2B SaaS company helping businesses maximize the value of their first-party customer data. Our platform helps marketers collect, unify, and activate customer data to improve marketing performance and drive measurable growth.
You'll turn complex product requirements into fast, reliable, and delightful web experiences. You'll build reusable UI with React and JavaScript, care deeply about responsive design and performance, and ship with strong testing and browser compatibility.
· Build reusable UI components and frontend features using JavaScript, React, HTML5, and CSS3.
· Deliver responsive, mobile-first, pixel-accurate experiences across devices.
· Ensure consistent behavior across Chrome, Safari, Firefox, and Edge.
· Profile and optimize loading, rendering, bundle size, and runtime performance.
· Improve Core Web Vitals and build performance guardrails into everyday development.
· Write unit/component and automated browser tests to prevent regressions.
· Use DevTools to diagnose network, performance, memory, layout, and rendering issues.
· Build features using modern Web APIs and Progressive Web App patterns.
· Collaborate with Product, Design, and Backend on scalable frontend systems.
· Strong hands-on experience building production web applications with React and JavaScript.
· Deep fundamentals in JavaScript, React, HTML, and CSS.
· Strong problem-solving and DSA fundamentals applied to frontend performance and correctness.
· Responsive, mobile-first design and modern CSS knowledge.
· Practical cross-browser debugging experience.
· Performance profiling and measurable optimization experience.
· Unit testing and automated browser testing experience.
· Understanding of Core Web Vitals, Web APIs, browser DevTools, and PWA fundamentals.
· Strong ownership, communication, collaboration, and attention to UX quality.
· TypeScript.
· Accessibility knowledge including semantic HTML, keyboard navigation, and ARIA basics.
· Production performance monitoring, analytics, and error tracking experience.
· Interest in rapid prototyping and tool-assisted development without compromising quality.
· Features are fast, reliable, responsive, accessible, and tested.
· Frontend architecture becomes easier to scale and maintain.
· Users experience a smoother product because performance and UX are treated as engineering priorities.
— A place where you’re trusted to own your work, make decisions, learn from the experience, and keep moving forward. You’ll know what you’re working towards, have the freedom to grow into bigger responsibilities, and see the impact of what you do. Teams here don’t work in isolation Sales, Marketing, Design, Engineering, and others work closely, challenge ideas, and build better things together. And when we’re not building, we make time to learn, connect, have fun, and bring the whole Kootam together.
We're active on LinkedIn, Instagram talking about what we do at CustomerLabs.
Would you like to know our stories? Catch up on what we're up to on the LinkedIn page of our HR Team - Devarshini, Aswin, Kunguma! Take a sneak peek at our behind the scenes fun at our team-run Instagram page.
How to apply for Front End Developer (React.js) at CustomerLabs?
Click the "Apply on Company Website" button on this page to submit your application directly on the employer's official portal.
What is the salary for this role?
Salary details will be discussed during the interview.
What experience is required?
2-6 years of experience is required.
Is this position still open?
Yes, currently active and accepting applications.
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